Hoag's object, which is a galaxy within a galaxy within a galaxy, has befuddled stargazers since astronomer Arthur Hoag discovered it in 1950.
Scientists hunting for neutral hydrogen — a rare molecule that predates every star in the universe — just took a step closer to catching their prize.
Archaeologists think they may have discovered the oldest chess piece in the world, excavated from a seventh-century trading site in Jordan.
Scientists recorded a blue whale's heartbeat for the first time, and found that the world's largest creatures can survive on just two beats per minute while diving for food.
At the edge of our solar system, a fierce battle rages between solar wind and interstellar rays. NASA's Voyager 2 spacecraft has now passed through the frontlines.
In 1987, a star exploded, creating the brightest supernova to light up Earth's skies in 400 years. That star's corpse has been missing for 30 years. Now, researchers think they've found it.
The sun's surface is covered by millions of enormous plasma jets known as spicules at any given moment. Now, researchers think they know why.
Venice is in a state of emergency as the Italian city braces from one of the worst floods in its history.
NASA astronomers have detected one of the brightest explosions of X-ray energy ever seen, and they think it came from a greedy neutron star in the Sagittarius constellation.
Taku glacier in Juneau, Alaska, is the world's thickest mountain glacier and was supposed to continue growing through the end of the century. Now, it's losing ground due to climate change.
Curiosity is the last functioning rover on Mars, and its lonely mission has taken the robot to a steep mountain in the middle of a vast crater.
The man, known as Lobo, was just one of at least 135 indigenous people murdered in the Amazon over the last year.
A 13th-century painting that hung over an elderly French woman's hot plate for years has sold at auction for $26.8 million.
Using genetic data from 1,200 modern indigenous Africans, researchers believe they’ve pinpointed the location of the first permanent human settlement, which thrived 200,000 years ago.
Two Earth-like exoplanets appear to have smashed into each other in a distant solar system, and the cosmic carnage is only getting worse.
The skeletons of two women — an adult and a child — were discovered buried in a lost chapel in the infamous Tower of London. They don't appear to have been prisoners.
The Paris Zoological Park is debuting a new exhibit on 'the blob' — a brainless, single-cell slime mold with incredible problem-solving potential.
A destructive tornado hit northern Dallas on Sunday, Oct. 20, causing widespread power outages and significant property damage.
The Pulpí Geode, in southern Spain, is the largest geode in the world. For the first time, scientists think they know how it was made.
A nonprofit called The Earth Archive wants to make a 3D map of the entire planet, before the climate crisis changes Earth's face forever.
The mysterious Fermi bubbles at the center of the Milky Way may have been caused by a gargantuan nuclear explosion 3.5 million years ago, new research suggests.
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